一些历史学家认为，秦始皇的死是由于自然原因引起的。根据《史记》的记载，秦始皇在巡游期间，因食用不洁食物而导致身体不适，最终在沙丘去世。这种说法认为，秦始皇的死与他年老体衰、饮食不当等因素有关。

秦始皇墓的挖掘面临着巨大的技术挑战。首先，墓葬的结构复杂，考古学家在挖掘过程中需要非常小心，以避免对墓葬本身造成损害。根据现有的考古资料，秦始皇墓的主体结构是一个巨大的土丘，内部可能有复杂的通道和房间，挖掘时一旦出现失误，可能会导致整个结构的崩塌。

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